Drop Down activates when Vector charts are displayed.

• Base
• Standard
• All
• User Standard

See https://opencpn.org/wiki/dokuwiki/doku.php?id=opencpn:opencpn_user_manual:charts:vector_display_tab&s[]=display&s[]=category#display_categories

opencpn:opencpn_user_manual:charts:vector_display_tab&s[]=display&s[]=category#display_categories